Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
thuat tac » thuat tach, thuat tao, thuat tai
truoc va » truc va, thuoc va, truong va
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
tac ky » tac ke, cac ky, tap ky
va lam » van lam, va lap
va dan » ca dan, va dao, va dau
va hoa » van hoa, va hoc, ma hoa
vi ha » vu ha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat tac ky nang xa hoi. hieu va lam truoc va dan ((((vi ha) or (li hoc))) or (va hoa)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat tac ky nang xa hoi. hieu va lam truoc va dan ((((vi ha) OR (li hoc))) OR (va hoa)) viet.
• Adding a wildcard symbol may retrieve word variants: thuat tac ky nang xa hoi. hieu va lam truoc va dan ((((vi ha) or (li hoc))) or (va hoa)) viet*.